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DAKOTA TECHNOLOGIES <br />UVIST LOG REFERENCE <br />2008-12-12 <br />hain Plot: <br />Signal (total fluorescence) versus depth where signal is relative to the <br />Reference Emitter (RE). The total area of the waveform is divided by the total <br />area of the Reference Emitter yielding the %RE. This %RE scales with the <br />NAPL fluorescence. The fill color is based on relative contribution of each <br />channel's area to the total waveform area (see callout waveform). The channel- <br />to-color relationship and corresponding wavelengths are given in the upper right <br />corner of the main plot. <br />Callouts : <br />Waveforms from <br />selected depths or 00- 14 Ng!:11 (%REI 350 400 450 500 ("'01' <br />*12=2222ulng ;0.0. . - <br />waveform for that 5 <br />depth. <br />2.2 · 4.65•Note A W <br />Callouts <br />Conductivity Plot : <br />The Electrical <br />Conductivity (EC) of the <br />soil can be logged <br />simultaneously with the <br />UVOST data. EC often <br />provides insight into the <br />stratigraphy. <br />Note the drop in EC from <br />10 - 13 ft, indicating a <br />shift from consolidated to <br />unconsolidated <br />stratigraphy. This <br />-04.-correlates with the <br />observed NAPL <br />distribution. <br />5 <br />l <br />The four peaks are due 1 <br />to fluorescence at four <br />wavelengths and <br />referred to as <br />"channels". Each <br />channel is assigned a 1.3 •RE 25 9- li <br />color. <br />too- 1 <br />80 <br />80· <br />to.O f <br />:20 <br />£ ./ b.. -1 <br />C.. <br />€ Rate Plot : <br />3 The rate of probet 2/, advancement. - 0.8in <br />(2cm) per second is <br />U preferred. <br />..i <br />Various NAPLs will <br />) have a unique <br />- waveform "fingerprinr <br />72.9 *RE <br />due to the relative <br />amplitude of the four ' 1 <br />channels and/or <br />broadening of one or 20 <br />more channels. f <br />bily <br />1 33.2 <br />A noticeable decrease in <br />the rate of advancement <br />may be indicative of <br />difficult probing <br />conditions (gravel, <br />angular sands, etc.) <br />such as that seen here <br />at -5 ft. <br />Basic waveform <br />statistics and any <br />operator notes are <br />given below the callout. <br />f 100 <br />14 0 <br />-00>1 Nde C <br />16 0 g <br />18.0 1 <br />Note B <br />lilli <br />WRE {/ 4.21 <br />{i <br />1 39 <br />3,2 1 <br />0 20 •0 .- 60 <br />Sample Data <br />2401 <br />$ <br />Notice that this log was <br />terminated arbitrarily, not <br />due to "refusal", which <br />would have been <br />indicated by a sudden <br />rate drop at final depth. <br />1 -1 <br />05 10 <br />UVOST By Dakota <br />* w.- L/out/*•0M com <br />51/Lamuds/Daium.An/depth. <br />Fargo, NO , - , 44 54430700 N; W!34414 .2403 R <br />DAKOTA Ct•entf Job:Long•tude / Fnt :Me* 8191}et <br />ABCConeut*Ang ... 09847.753700 W/31) 10%8Eg11231, <br />.8, 01".4.Ina Opet'tor i Unal *Elevalion Date & hme <br />*St Gicineln UVOOTIOOD 782,5 h 2001.11-12 11:39 EST <br />Info Box: <br />- Contains pertinent log <br />f info including name andlocation. <br />Note A: <br />Time is along the x axis. No scale <br />is given, but it is a consistent <br />320ns wide. <br />The y axis is in mV and directly <br /> corresponds to the amount oflight striking the photodetector. <br />Note B: <br />These two waveforms are clearly <br />different. The first is weathered <br />diesel from the log itself while the <br />second is the Reference Emitter <br />(a blend of NAPLs) always taken <br />before each log for calibration. <br />SL Rvcd 2019.01.21 <br />Note C: <br />Callouts can be a single depth <br />(see 3rd callout) or a range (see <br />4th callout). The range is noted <br />on the depth axis by a bold line. <br />When the callout is a range, the <br />average and standard deviation <br />in %RE is given below the <br />callout.